Patents by Inventor Frank Schaper

Frank Schaper has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Selective preparation of racemic ansa-metallocene complexes
    Patent number: 5892081
    Abstract: The present invention relates to a process for preparing racemic ansa-metallocene complexes I ##STR1## tin compounds II ##STR2## and a process for preparing tin compounds II. R.sup.1 to R.sup.9, M, and X are defined herein.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: April 6, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Carsten Suling, Mario Huettenhofer, Hans-Herbert Brintzinger, Frank Schaper